# Krypton ## 🧊 Krypton · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=Kr&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Krypton"></iframe> *Krypton in the live three.js Elements explorer — drag to orbit the atom, click any tile to compare, slide the temperature.* · [▶ open full](https://wikitube-elements.netlify.app/?el=Kr) <!-- ELEMENTS_MICROSIM:END --> !Krypton plate.svg *Plate 36 of 118 - animated Bohr shells, stylized per Madelung filling; engraving style per house Arcanity kit.* ## Microsim To Do *Claimable rows, house pattern. Real Wikipedia articles only.* - Liquid air and fractional distillation - noble gas separation techniques - [[Noble_gas|Noble gas chemistry and inertness]] - krypton's place among inert elements - Krypton lamp and lighting - incandescent and excited state applications ## Links (Wikipedia order) <!-- injected from _registry/childlinks/Krypton.json (2026-07-30T02:09:12Z) --> [[Actinium]] · `Alkali_metal` · `Alkaline_earth_metal` · [[Aluminium]] · [[Americium]] · [[Antimony]] · [[Argon]] · `Argon_compounds` · `Argon_fluoride_laser` · `Argon_fluorohydride` · `Argonium` · [[Arsenic]] · `Asphyxiant_gas` · [[Astatine]] · `Atomic_number` · [[Barium]] · [[Berkelium]] · [[Beryllium]] · `Bis(pentafluorophenyl)xenon` · [[Bismuth]] · `Block_(periodic_table)` · [[Bohrium]] · [[Boiling_point]] · [[Boron]] · `Boron_group` · [[Bromine]] · `CAS_Registry_Number` · `CERN` · `CRC_Handbook_of_Chemistry_and_Physics` · `CRC_Press` · [[Cadmium]] · [[Caesium]] · `Caesium_heptafluoroxenate` · [[Calcium]] · 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· `Xenon_dioxydifluoride` · `Xenon_fluoride_nitrate` · `Xenon_hexafluoride` · `Xenon_hexafluoroplatinate` · `Xenon_hexafluororhodate` · `Xenon_monochloride` · `Xenon_nitrate` · `Xenon_octafluoride` · `Xenon_oxydifluoride` · `Xenon_oxytetrafluoride` · `Xenon_tetrachloride` · `Xenon_tetrafluoride` · `Xenon_tetroxide` · `Xenon_trioxide` · `YouTube` · [[Ytterbium]] · [[Yttrium]] · [[Zinc]] · [[Zirconium]] > **Official MAIN - Chemical element, Z = 36.** Part of the Elements Canon (one canonical page per element). Infobox grounded in [Wikipedia: List of chemical elements](https://en.wikipedia.org/wiki/List_of_chemical_elements), fetched 2026-07-08. Full article: [Wikipedia: Krypton](https://en.wikipedia.org/wiki/Krypton). <!-- ELEMENTS_MICROSIM:BEGIN (auto-managed block - edits inside will be overwritten) --> ## Key facts (infobox) | | | |---|---| | Symbol - Z | Kr - 36 | | Group - Period - Block | 18 - 4 - p-block | | Atomic weight (Da) | 83.798 | | Density (g/cm3) | 0.003749 | | Melting - Boiling (K) | 115.79 - 119.93 | | Electronegativity (Pauling) | 3.00 | | Crustal abundance (mg/kg) | 1e-4 | | Origin | primordial | | Phase (STP) | gas | | Name origin | Greek kryptos, 'hidden' | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Krypton was discovered in 1898 by Scottish chemist Sir William Ramsay and English chemist Morris William Travers by fractionally distilling liquid air. Ramsay had won the Nobel Prize just four years earlier for discovering argon through similar techniques; krypton (along with neon and xenon) emerged from the same systematic approach to liquefying air and separating its noble gas components. The name "krypton" comes from the Greek word "kryptos," meaning hidden, reflecting the element's extreme rarity and that it was literally hidden in the air until liquefaction made it accessible [model-prior - verify]. Krypton is a colorless, odorless, monatomic noble gas that is chemically inert—it forms almost no stable compounds under normal conditions [model-prior - verify]. It occurs naturally in the atmosphere at a concentration of about 1 part per million, making it far rarer than nitrogen or oxygen but more abundant than xenon [model-prior - verify]. Krypton has two notable properties: it emits a characteristic white light when excited by electricity, and krypton-85 (a radioactive isotope) is useful for high-intensity photographic flash tubes [model-prior - verify]. Industrial uses include specialized lighting, insulating glass windows, and medical aerosol inhalers [model-prior - verify]. In the corpus, krypton marks the completion of period 4 of the periodic table—the boundary between the lighter main-group elements and the beginning of the heavier elements. Its rarity and stability exemplify the noble gases' fundamental chemical inertness, a principle that structures the entire periodic table's organization. ## Corpus connections - R.E.A.C.T.I.O.N. - the Chemistry hub - Centers of Excellence Portal - [[Technetium|Technetium - the element made before found]] - the canon's patron - and Technitium, the School ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (Kr, group 18, period 4), isotope notation, and hazard pictograms ghs where handling demands it. ## Sources Infobox: [en.wikipedia.org/wiki/List_of_chemical_elements](https://en.wikipedia.org/wiki/List_of_chemical_elements) (fetched 2026-07-08); etymology per the same table's notes. Story sources to be added at enrichment. ## Navigation - Canon: Elements Canon index - neighbors by Z: [[Bromine|Bromine (35)]] - [[Rubidium|Rubidium (37)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Krypton) : [Wikitube](https://en.wikitube.io/wiki/Krypton) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*